Abstract: AIM To investigate whether preoperative evaluation reduces the rate of unplanned hospitalization and outpatient visits within 3 and 6 months after coronary intervention in elderly patients with coronary heart disease. METHODS 100 elderly patients undergoing coronary heart disease were randomly assigned to the comprehensive assessment (CGA) group (comprehensive assessment group) and a routine treatment group. The patients in the comprehensive evaluation group developed the patients’ perioperative and post-discharge treatment regimen, according to comprehensive evaluation results. In the conventional treatment group, the patients were treated according to the conventional procedure. Each group was divided into surgical and non-surgical subgroups, according to the interventional treatment of coronary intervention. All patients were followed up by telephone at 3 and 6 months after discharge. The follow-up included whether the patient was hospitalized for unexplained hospital admissions and reasons. RESULTS There was no significant difference in admission rate between the two groups at 3 and 6 months after discharge, regardless of whether CGA and coronary intervention were received. There was no significant difference in the outpatient rate between the two groups at the end of 3 months after discharge, and the outpatient rate was significantly lower (36% vs. 56%, P<0.05) at 6 months after discharge when compared with the conventional treatment group. Compared with those in the subgroup of patients undergoing surgery in the conventional treatment group, patients in the comprehensive assessment group undergoing surgery were significantly lower (3 months, 33% versus 0.75%, P<0.05; 6 months, 53% vs. 100%, P<0.01). CONCLUSION Preoperative comprehensive assessment significantly reduces the number of patients admitted to the hospital for coronary heart disease after coronary intervention and short-term re-admission rate and outpatient attendance.